Stats by Source
Total, split by cell line (COSMIC CL / DepMap / PubMed) vs tissue (COSMIC primary tissue)
Total = all mutations for this gene across every source.
Cell line = COSMIC Cell Lines Project + DepMap + PubMed.
Tissue = COSMIC primary-tissue (patient tumour) samples.
Total can exceed cell line + tissue: COSMIC tissue-derived models sit only in global, and a peptide can be shared across both.
| Total | Cell line | Tissue | |
|---|---|---|---|
| Mutations | 265 | 28 | 236 |
| Samples | 136 | 21 | 114 |
| Peptides | 109 | 16 | 94 |
Function
C1QA · Complement C1q A chain
This gene encodes the A-chain polypeptide of serum complement subcomponent C1q, which associates with C1r and C1s to yield the first component of the serum complement system. C1q deficiency is associated with lupus erythematosus and glomerulonephritis. C1q is composed of 18 polypeptide chains which include 6 A-chains, 6 B-chains, and 6 C-chains. Each chain contains an N-terminal collagen-like region and a C-terminal C1q globular domain. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Nov 2016].
Isoforms & Proteins
2 transcripts · UniProt mapping is sequence-verified (AA-safe)
Each Ensembl transcript (ENST) this gene is mutated on, with its matched UniProt accession.
The mapping is sequence-verified: the UniProt sequence is identical to the transcript translation, so amino-acid positions line up exactly. A * marks an unreviewed (TrEMBL) entry.
Counts are mutations and unique mutant peptides on each transcript.
Gene Properties
Recurrent Mutations
All 109 amino-acid changes on canonical ENST00000374642 · needle height = samples · drag the mini-map to zoom
A lollipop / needle plot – the standard way to show recurrent mutations along a protein (as used by cBioPortal and MutationMapper).
X-axis = amino-acid position in the protein.
Needle height & head size = how often that exact amino-acid change was observed (its recurrence). Tall/large heads are mutational hotspots.
The most recurrent changes are labelled; hover any needle for the change, position and counts.
Mutation frequency across cancer types
% of samples with a missense/complex mutation in C1QA · cell line vs tissue
For each cancer type, the fraction of samples that carry at least one missense/complex mutation anywhere in C1QA – counted as distinct samples (a sample counts once no matter how many mutations it has).
Split into cell line and tissue; each cell shows mutated / total and the percentage. Cohorts with <20 samples are omitted. Ordered by combined frequency.
| Cancer type | Cell lines | Tissue samples |
|---|---|---|
| Chronic Myelogenous Leukemia | 2/25 8% | 0/0 0% |
| Glioblastoma | 4/98 4% | 0/0 0% |
| T-Cell Non-Hodgkins Lymphoma | 1/26 4% | 0/0 0% |
| Endometrial Carcinoma | 1/42 2% | 6/612 1% |
| Melanoma | 4/210 2% | 15/1899 1% |
| Plasma Cell Myeloma | 2/44 5% | 1/305 0% |
| Non-Small Cell Lung Carcinoma | 2/304 1% | 8/1390 1% |
| Small Cell Lung Carcinoma | 0/9 0% | 4/752 1% |
| Bladder Carcinoma | 0/58 0% | 5/956 1% |
| Burkitts Lymphoma | 0/32 0% | 1/196 1% |
| Hepatocellular Carcinoma | 0/46 0% | 10/2210 0% |
| Biliary Tract Carcinoma | 1/54 2% | 3/950 0% |
| Other Sarcomas | 1/69 1% | 2/699 0% |
| Other Solid Cancers | 0/94 0% | 6/1515 0% |
| Esophageal Squamous Cell Carcinoma | 0/51 0% | 9/2550 0% |
| Thyroid Gland Carcinoma | 0/45 0% | 5/1592 0% |
| Colorectal Carcinoma | 1/143 1% | 9/3239 0% |
| Glioma | 0/52 0% | 5/2127 0% |
| Squamous Cell Lung Carcinoma | 0/57 0% | 2/810 0% |
| Medulloblastoma | 0/0 0% | 1/450 0% |
| Cervical Carcinoma | 0/35 0% | 1/422 0% |
| Gastric Carcinoma | 0/74 0% | 4/1809 0% |
| Non-Cancerous | 0/104 0% | 2/830 0% |
| Head and Neck Carcinoma | 1/85 1% | 2/1574 0% |
| Breast Carcinoma | 0/144 0% | 6/3264 0% |
| Kidney Carcinoma | 0/85 0% | 3/1862 0% |
| Neuroendocrine Tumour | 0/154 0% | 1/577 0% |
| Esophageal Carcinoma | 0/23 0% | 1/769 0% |
| Ovarian Carcinoma | 0/109 0% | 1/998 0% |
| Neuroblastoma | 1/87 1% | 0/1331 0% |
Mutation Distribution
Where C1QA is mutated · all tissues, split by cell line vs tissue
How many mutations in C1QA were found in each tissue, across the whole database.
Each bar is a tissue (cell-line and tissue names are merged to the standard tissue), split into cell line and tissue (patient tumour) contributions.
This shows the cancer-context where this gene is recurrently altered.
GTEx Expression
Median TPM across 54 healthy tissues
Median gene expression (TPM) in normal, non-cancer human tissues from the GTEx project.
Useful for judging tumour specificity – a strong neoantigen target ideally comes from a gene with low expression in healthy tissues.
Scroll or drag the mini-axis below the chart to browse all tissues.
Mutations
All 265 mutations in C1QA
Every mutation record for this gene, across all samples and sources.
The Sample column links to the cell line (cell-line samples) or the tissue type (tissue samples).
Use the Type / Source filters, the search box, and column sorting to explore; each CAN-IMMUNE ID opens the full mutation & peptide view.
| ID | Sample | Transcript | AA Change | CDS | Type | Source | Mutant Peptide | Wild-type Peptide |
|---|